To facilitate assembling work and to keep satisfactory appearance of a pair of attaching parts fixed to two assembling parts to be connected for connecting them to each other, and an assembling mechanism for connecting the two assembling parts.

An attaching part 20 is fixed to an assembling member by means of a fixing part 22 of a plate member 21. The plate member 21 has one side 21a and the other side 21b which is inclined to the side 21a. A plate part 23 is stood from the side 21b angularly to the plate member 21. The first attaching part 20 fixed to the first assembling member is connected to a second attaching part fixed to a second assembling member in the following manner. Relative movement is so performed that the side 21c between the side 21a and the side 21b leads and therefore the surfaces 23a of the first and second attaching parts are slid with each other.